/*******************************************************************************************
 * Copyright (c) 2009 Alex Robson, Rob Simmons, Craig Israel, and Rachel Twyford
 *
 * Use of this software in any form requires that you have both 
 * read and agreed to the following terms:
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the "Software"), 
 * to deal in the Software without restriction, including without limitation 
 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions: 
 *
 * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice, 
 * this list of conditions and the following disclaimer in the 
 * documentation and/or other materials provided with the distribution.
 * Neither the name of Nvigorate nor the names of its contributors may 
 * be used to endorse or promote products derived from this software without 
 * specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
 * DISCLAIMED. IN NO EVENT SHALL ANY CONTRIBUTOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * ****************************************************************************************/

using System;

namespace Nvigorate.Data.Query
{
    [Serializable]
    public abstract class QueryObject<T> :
        QueryComponent,
        INamed,
        IHaveOwner,
        IAliasable<T> where T : QueryComponent
    {
        #region Protected Fields

        protected string _alias = "";
        protected string _name = "";
        protected string _owner = "";
        protected string _ownerAlias = "";
        protected bool _ownedByVariable = false;

        #endregion
        
        #region Read-Only Properties

        public string Alias
        {
            get { return _alias; }
            set { _alias = value; }
        }

        public virtual string Name
        {
            get { return _name; }
            set { _name = value; }
        }

        public string Owner
        {
            get { return _owner; }
            set { _owner = value; }
        }

        public string OwnerAlias
        {
            get { return _ownerAlias; }
            set { _ownerAlias = value; }
        }

        public bool OwnedByVariable
        {
            get { return _ownedByVariable; }
        }

        #endregion

        public virtual T As(string alias)
        {
            _alias = alias;
            return this as T;
        }

        public virtual T OwnedBy(string owner)
        {
            _owner = owner;
            return this as T;
        }

        public virtual T OwnedBy(string owner, bool ownedByVariable)
        {
            _ownedByVariable = ownedByVariable;
            _owner = owner;
            return this as T;
        }

        public virtual T AliasOwner(string ownerAlias)
        {
            _ownerAlias = ownerAlias;
            return this as T;
        }

        #region Helper and Constructors

        public static QueryList operator +(QueryObject<T> object1, IQueryObject object2)
        {
            return new QueryList().Add(object1).Add(object2);
        }

        public static implicit operator QueryList(QueryObject<T> queryObject)
        {
            return new QueryList().Add(queryObject);
        }

        protected QueryObject(string name)
        {
            _name = name;
        }

        internal QueryObject() { }

        #endregion

    }
}